Electricity: power supply or regulation systems – In shunt with source or load – Using choke and switch across source
Patent
1996-11-12
1998-06-09
Sterrett, Jeffrey L.
Electricity: power supply or regulation systems
In shunt with source or load
Using choke and switch across source
323285, G05F 1613
Patent
active
057640394
ABSTRACT:
A power factor correction circuit for a boost-type voltage converter determines the input voltage by sensing the rate at which the current through an inductor changes when a switching transistor is turned on. The circuit includes a current sense circuit which generates a control signal in response to the current flowing in the inductor. The control signal is compared with a sawtooth signal to control the input current waveform. An output detecting circuit generates a comparison reference signal for regulating the output voltage of the converter. The comparison reference signal is summed with the control signal to provide a comparison signal. A comparison circuit compares the comparison signal with the sawtooth signal and generates a pulse width modulated signal for controlling the switch. A compensation signal generator generates a compensated comparison signal in response to a ripple component in the output signal of the converter. The compensated comparison signal is summed with the sawtooth signal to compensate for distortion in the input current, thereby increasing the power factor. An amplifier in the sense circuit allows a low value sense resistor to be used.
REFERENCES:
patent: 4683529 (1987-07-01), Bucher
patent: 4837495 (1989-06-01), Zansky
patent: 4942509 (1990-07-01), Shires et al.
patent: 5001620 (1991-03-01), Smith
patent: 5003454 (1991-03-01), Bruning
patent: 5006975 (1991-04-01), Neufeld
patent: 5146398 (1992-09-01), Vila-Masot
patent: 5359274 (1994-10-01), Bandel
patent: 5508602 (1996-04-01), Borgato et al.
patent: 5515261 (1996-05-01), Bogdan
patent: 5519306 (1996-05-01), Itoh et al.
patent: 5612609 (1997-03-01), Choi
patent: 5644214 (1997-07-01), Lee
Choi Nak-choon
Seo Maeng-ho
Samsung Electronics Co,. Ltd.
Sterrett Jeffrey L.
LandOfFree
Power factor correction circuit having indirect input voltage se does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Power factor correction circuit having indirect input voltage se, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power factor correction circuit having indirect input voltage se will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2204411